import pymysql

db = pymysql.connect(host='localhost', user='root', password='123456',port=3306, database='test')
cursor = db.cursor()
sql="UPDATE EMPLOYEE SET AGE=AGE+1 WHERE SEX='%c'" % 'M'
try:
    cursor.execute(sql)
    db.commit()
except:
    db.rollback()

db.close()